like in the science fiction stories. why? why does it stop? how can i make contact with the table, if this is mostly empty space and the table is mostly empty space? how many say that there is no explanation for that? there is an explanation, gang. you know what it is? oh, nobody be knowing. one be knowing. so you guys didn't have a chance to read the book this weekend. check the neighbor-- see if the neighbor knows. why is it you don't fall through your chair? anyone have any ideas? anyone? trish. do the charges repel each other? yes, electrical charges, right on, wonderful. wonderful. remember, we talked about the atom here, these electrons repelling other electrons? any electrons on your seat? yes, any electrons on your seat? and when these electrons squished closer and closer, what do they do? begin with "r" end with "l". they repel and this is an electrical repulsion, my friend, between you and the chairs upon which you sit. let's put it this way. let's suppose this table-- pretend this table is a magnet. you guys know about magnets repel